ok i know it probably sounds really stupid but i just got a new bass cab and head and i have no idea how to set it up since ive never done it before. the cab is a fender rumble 410 and the head is a peavey tour 450. i think you connect the bass to the "low gain" thingy in front of the head and run a speaker cable from one of the outputs behind the head labeled "speaker jacks paralleled" to the back of the cab where it is labeled "parallel outputs" but idk. im not getting any sound. any help would be appreciated. ps, the head also has a "aux in" thingy idk wt thats for. and also i have no idea where the volume knob on the head is, nothing is labeled volume, and does the cab require a power cable to? because it didn't come with one.